Hydraulic swivel.



H. G. JOHNSTON. HYDRAULIC SWIVEL.

APPLICATION FILED APR. 21,-1903.

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PATBNTBD 00T. 27,1903..

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No.v 742,667.

UNITED STATES Patented October 27, 1903.l

PATENT OEEICE.

ASSIGNOR OF ONE-HALF TO OF OORSIOANA, TEXAS.

HYDRAULIO SWIVEL.

SPECIFICATION forming' part of Letters Patent No. 742,667, dated October 2'?, 1903.

Application led April 21, 1903. ySerial No. 153,650. (No model.) I

To a/ZZ whom it may concern:

Be it known that I, HORACE G. JOHNSTON, a citizen of the United States, residing at Corsicana, in the county of Navarro and State of Texas, have invented certain new and useful Improvements in Hydraulic Swivels; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to improvements in hydraulic swivels; and the object in view is the production of mechanism for supporting a supply-hose in a given position while delivering Water to a rotating drill-tube, the hose being retained against movement.

With this and other objects in view the invention consists of a swivel-block, supporting means therefor, a swivelstern extending through said block, a hose-stem within said swivel-stein, and means carried by the hosestem rotatably supporting the swivel-stem.

It further consists in certain other novel constructions, combination, and arrangement of parts, as will be hereinafter fully described and claimed.

In the accompanying drawing, the figure represents a longitudinal vertical central section through a hydraulic swivel embodying the features of the present invention.

In the well-boring art it is necessary to supply water to the cutting end of the well-boring tube and to rotate said tube while being As disclosed in the accompanying drawing, I contemplate providing a swivel for supporting the water-supply pipe in a stationary condition while delivering water to the rotating tube.

Referring to the drawing by numerals, 1 indicates a bail or clevis of any preferred form apertured at its ends, as at 2 2, and finding bearings on the projecting reduced ends of the hollow trunnion-block 3, which block revolubly surrounds the swivel-stem 4 and is rovided at its ends with locking-bolts 11 and washers 12 for preventing lateral playhof the ends 2 of bail 1. The trunnion-block'3, as

suggested is hollow and is formed with an interior annular chamber, which produces a comparatively light and at the same time strong structure.

.preferably cut The swivel-stem 4 surrounds the hose-stem 5 and in operation revolves about the same. The lower end of the swivel-stem 4 is exteriorly threaded, and a bushing 6 is threaded upon the same for forming a close joint with the pipe-section to be connected to the lower end of said swivel-stem and for obviating danger of said stem shaking loose and unscrewing. In order to provide a close joint between swivel-stem 4 and hose-stem 5, the inner surface of the stem 4 is cut away, forming a stuffing-box 7, which box is preferably filled with hemp or other suitable packing materiah A gland 8 is threaded into the lower end of said stem 4 for closing said stuffing-box 7 and retaining the packing in position. A collar 9 surrounds stem 4 just below and preferably the trunnion-block 3, and a set-screw or other suitable engaging means 10 is passed through said collar and into contact with the swivelstem 4 for taking up any excessive wear. Mounted above and resting upon said trunnion-block 3 is an annular collar 13, and a similar collar 14 is placed above collar 13, the space between said collars being maintained by means of cones 15 or other suitable antifriction devices traveling within annular raceways 16 and 17, formed in the said collars for limiting the lateral play of said cones.

The upper end of swivelstem is externally screw-threaded, and a nut 18, formed with an annular housing 19, is threaded thereon and screwed down upon collar 14, with the housing 19 inclosing both collars 13 and 14 for retaining the same against vertical movement or other dislocation. The inner surface of the upper end of stern 4 is away for a short distance, forming an annular stufng-box 20, designed vto be filled with any preferred packing, and a gland 21 closes the upper end of said box for retaining the packing in position. Threaded upon the upper end of the swivel-stem 4 is a cap 22, which is provided with an inner annular shoulder resting upon the iange of gland 21', whereby a tight closure is made between the upper end of the swivel-stem 4 and the hose-stein 5.

A superimposed annular cap 23 is threaded upon the upper end of the cap 22 and forms formed rintegral with IOO an annular housing about said stem 5, closed at the upper end by an annular shoulder formed integral with said bushing 23. This annular housing is filled by upper and lower collars 24 24, secured to said cap 23, each provided with an annular raceway or groove for the reception of bearings, as will be hereinafter mentioned. A central collar 25 is fixed to stem 5 between collars 24 24 and is provided on both its edges with bearing-receiving grooves similar to those in collars 24 24, said collar 25 being spaced from the collars 24 24 by ball or other antifriction bearings 26 26, interposed between said collars and riding in said annular grooves or raceways.

A gooseneck 27 is threaded onto the upper end of the hose-stem 5 and carries a suitable union or coupling 28, adapted to receive any preferredform of supply pipe or hose 29.

In operation the bail 1, being supported by any preferred tackle carried by a suitable derrick, supports the elements carried bythe trunnon-block, and the parts are brought into line with the section of the well-boring tube, and the lower end of the swivel-stem 4 is connected to the section of water-supply pipe of the well-boring mechanism, and the said section of supply-pipe, together with the improved swivel, is raised to a vertical position and connected with the pipe already in the Well. The water may now be forced through the hose connection 28, and it will find its way down through the hose-stem 5 and into the supply-pipe, from which it passes out under the cutting edge of said pipe, the said supply pipe or tube being given a rotary motion by any of the well-known means, said supply-pipe and rotating means not being shown. During operation the swivelstem 4, collar 14, nut 18, caps 22 and 23, with collars 24 24, and the bushing G will revolve with the pipe, to which the parts are connected. The collar 13, bail 1, trunnion-block 3, and hose-stem 5 and its hose connections will remain stationary. It will be apparent that the water will be prevented from passing betwen swivel-stem 4 and hose-stem 5 by means of the packing within the stuffingboxes 7 and 20.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In a hydraulic swivel, the combination with a trunnion-block and a bail supporting the same,'of a swivel-stem extending through said block, a hose-stem within said swivel; stem, a collar surrounding said swivel-stem above said block, a similar collar spaced above the first-mentioned collar, antifriction means interposed between said collars, and a housing carried by said swivel-stem inclosing said collars.

2. In a hydraulic swivel, the combination with a suitable support, of a swivel-stem, a collar surrounding the same, a collar carried by said stem, antifriction-bearings interposed between said collars, a nut threaded on said swivel-stem above the uppermost collar, and

a housing depending from said nut inclosing said antifriction means.

3. In a hydraulic swivel, the combination `with a suitable support, of a swive1-stem, a

collar surrounding the same and rotatably mounted upon said support, an annular depending housing carried bysaid swivel-stem inclosing said collar, and a hose-stem rotatably mounted independently oi said swivelstem, substantially as described. Y

4. A hydraulic swivel, comprising a trunnion-block, means for lifting the same swiveled thereto, a swivel-stem passed through said trunnion-block, a hose-stem within the same, means forv supporting said trunnion-A block vertically with relation to said swivelstem, an annular collar surrounding said swivel-stem above said trunnio-nblock, a similar collar above the same, antii'riction means interposed between said collars, and

said collars and antifricposition, substantially as demeans for retaining tion means in scribed.

5. A hydraulic swivel, comprisinga swivelstem, a hose-stem within the swivel-stem, means for revolubly supporting the swivelstem, a bushing threaded upon the upper end of said swivel-stem, closing the upper end thereof, the said upper end of the swivel-stem being formed with an inner, annular space forming a stuing-box between the said stem and the hose-stem, means for closing said stuing-box, and means at the lower end of said swivel-stem for preventing water from entering between said swivel and hose stems, substantially as described.

In testimony whereof I hereunto aix my signature in presence of two witnesses.l

e HORACE G. JOHNSTON. lVitnesses:

T. B. CONNER, CLYDE HARLE.`

IOO 

